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1997 Pontiac Grand Am Cylinders 1 and 2 are not firing.

Tiny
BRASSINGTON2
  • MEMBER
  • 1997 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • MANUAL
  • 160,000 MILES
I have replaced the coils with spares I have had laying in my garage and it made no difference. Cylinder 1 had a new injector installed a couple months ago and I also put in a new crank position not long before that. I have new boots on the coils and new spark plugs.

I was told it could possibly be the magnets on the crank that the position sensor reads from. Ive heard they have an issue at high mileage of falling off. If thats the case I cant afford to fix the issue.

What else could cause this problem.
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Wednesday, July 22nd, 2009 AT 2:45 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Crank sensor would affect all cylinders, not just two.

It really sounds like bad coil, plugs.

I would also perform a compression test to see if you have a headgasket problem, and inspect electrical connections to coils for frayed/burnt wires.
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Thursday, July 23rd, 2009 AT 8:39 AM

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